/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. Camunda licenses this file to you under the Apache License,
 * Version 2.0; you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.camunda.bpm.engine.impl.migration.validation.instruction;

import org.camunda.bpm.engine.impl.bpmn.parser.EventSubscriptionDeclaration;
import org.camunda.bpm.engine.impl.jobexecutor.TimerDeclarationImpl;
import org.camunda.bpm.engine.impl.pvm.process.ActivityImpl;
import org.camunda.bpm.engine.impl.pvm.process.ScopeImpl;

/**
 * Ensure that the option updateEventTriggers can only be used activities defining an event trigger
 *
 * @author Thorben Lindhauer
 */
public class UpdateEventTriggersValidator implements MigrationInstructionValidator {

  @Override
  public void validate(ValidatingMigrationInstruction instruction, ValidatingMigrationInstructions instructions,
      MigrationInstructionValidationReportImpl report) {
    ActivityImpl sourceActivity = instruction.getSourceActivity();

    if (instruction.isUpdateEventTrigger() && !definesPersistentEventTrigger(sourceActivity)) {
      report.addFailure("Cannot update event trigger because the activity does not define a persistent event trigger");
    }
  }

  public static boolean definesPersistentEventTrigger(ActivityImpl activity) {
    ScopeImpl eventScope = activity.getEventScope();

    if (eventScope != null) {
      return TimerDeclarationImpl.getDeclarationsForScope(eventScope).containsKey(activity.getId())
          || EventSubscriptionDeclaration.getDeclarationsForScope(eventScope).containsKey(activity.getId())
          || TimerDeclarationImpl.getTimeoutListenerDeclarationsForScope(eventScope).containsKey(activity.getId());
    }
    else {
      return false;
    }
  }

}
